Examples with JavalinServlet io.javalin.http.JavalinServlet used on opensource projects

Example 1 with JavalinServlet

use of io.javalin.http.JavalinServlet in project cwms-radar-api by USACE.

the class ApiServlet method init.

@Override
public void init() throws ServletException {
    String context = this.getServletContext().getContextPath();
    PolicyFactory sanitizer = new HtmlPolicyBuilder().disallowElements("<script>").toFactory();
    ObjectMapper om = new ObjectMapper();
    JavalinValidation.register(UnitSystem.class, UnitSystem::systemFor);
    om.setPropertyNamingStrategy(PropertyNamingStrategies.KEBAB_CASE);
    // Needed in Java 8 to properly format java.time classes
    om.registerModule(new JavaTimeModule());
    AccessManager accessManager = buildAccessManager();
    javalin = Javalin.createStandalone(config -> {
        config.defaultContentType = "application/json";
        config.contextPath = context;
        config.registerPlugin(new OpenApiPlugin(getOpenApiOptions()));
        config.enableDevLogging();
        config.requestLogger((ctx, ms) -> logger.finest(ctx.toString()));
        config.accessManager(accessManager);
    }).attribute("PolicyFactory", sanitizer).attribute("ObjectMapper", om).before(ctx -> {
        ctx.attribute("sanitizer", sanitizer);
        ctx.header("X-Content-Type-Options", "nosniff");
        ctx.header("X-Frame-Options", "SAMEORIGIN");
        ctx.header("X-XSS-Protection", "1; mode=block");
    }).exception(FormattingException.class, (fe, ctx) -> {
        final RadarError re = new RadarError("Formatting error");
        if (fe.getCause() instanceof IOException) {
            ctx.status(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        } else {
            ctx.status(HttpServletResponse.SC_NOT_IMPLEMENTED);
        }
        logger.log(Level.SEVERE, fe, () -> re + "for request: " + ctx.fullUrl());
        ctx.json(re);
    }).exception(UnsupportedOperationException.class, (e, ctx) -> {
        final RadarError re = RadarError.notImplemented();
        logger.log(Level.WARNING, e, () -> re + "for request: " + ctx.fullUrl());
        ctx.status(HttpServletResponse.SC_NOT_IMPLEMENTED).json(re);
    }).exception(BadRequestResponse.class, (e, ctx) -> {
        RadarError re = new RadarError("Bad Request", e.getDetails());
        logger.log(Level.INFO, re.toString(), e);
        ctx.status(e.getStatus()).json(re);
    }).exception(IllegalArgumentException.class, (e, ctx) -> {
        RadarError re = new RadarError("Bad Request");
        logger.log(Level.INFO, re.toString(), e);
        ctx.status(HttpServletResponse.SC_BAD_REQUEST).json(re);
    }).exception(NotFoundException.class, (e, ctx) -> {
        RadarError re = new RadarError("Not Found.");
        logger.log(Level.INFO, re.toString(), e);
        ctx.status(HttpServletResponse.SC_NOT_FOUND).json(re);
    }).exception(FieldException.class, (e, ctx) -> {
        RadarError re = new RadarError(e.getMessage(), e.getDetails(), true);
        ctx.status(HttpServletResponse.SC_BAD_REQUEST).json(re);
    }).exception(JsonFieldsException.class, (e, ctx) -> {
        RadarError re = new RadarError(e.getMessage(), e.getDetails(), true);
        ctx.status(HttpServletResponse.SC_BAD_REQUEST).json(re);
    }).exception(Exception.class, (e, ctx) -> {
        RadarError errResponse = new RadarError("System Error");
        logger.log(Level.WARNING, String.format("error on request[%s]: %s", errResponse.getIncidentIdentifier(), ctx.req.getRequestURI()), e);
        ctx.status(500);
        ctx.contentType(ContentType.APPLICATION_JSON.toString());
        ctx.json(errResponse);
    }).routes(this::configureRoutes).javalinServlet();
}